package com.example.demo.controller;

import com.example.demo.utils.Base64;
import com.example.demo.utils.PassToken;
import com.example.demo.utils.ServiceResponse;
import com.google.code.kaptcha.Producer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.util.Base64Utils;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

@RestController
public class CodeController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;
    @Value("char")
    private String captchaType;

    @Autowired
    private RedisTemplate redisTemplate;

    @PassToken
    @GetMapping("/getCheckCode")
    public ServiceResponse getCheckCode(HttpServletResponse response){
        String uuid = UUID.randomUUID()+"";
        String verifyKey = "captcha_codes:"+uuid;
        String capStr = null,code = null;
        BufferedImage image = null;

        capStr = code = captchaProducer.createText();
        image = captchaProducer.createImage(capStr);

        redisTemplate.opsForValue().set(verifyKey,code,2, TimeUnit.MINUTES);
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image,"jpg",os);
        }
        catch (IOException e){
            return ServiceResponse.createByFail(500,"获取验证码失败");
        }
        Map<String,Object> map = new HashMap<>();
        map.put("uuid",uuid);
        map.put("img", Base64.encode(os.toByteArray()));
        return ServiceResponse.createBySuccess(200,map,"获取成功");


    }
}
